- family: Mecysmaucheniidae
![[see contained taxa]](./arrow.png)
- genus: Mecysmauchenius
- species: Mecysmauchenius canan Forster & Platnick, 1984
- species: Mecysmauchenius chacamo Forster & Platnick, 1984
- species: Mecysmauchenius chapo Forster & Platnick, 1984
- species: Mecysmauchenius chepu Forster & Platnick, 1984
- species: Mecysmauchenius chincay Forster & Platnick, 1984
- species: Mecysmauchenius eden Forster & Platnick, 1984
- species: Mecysmauchenius fernandez Forster & Platnick, 1984
- species: Mecysmauchenius gertschi Zapfe, 1960
- species: Mecysmauchenius newtoni Forster & Platnick, 1984
- species: Mecysmauchenius osorno Forster & Platnick, 1984
- species: Mecysmauchenius platnicki Grismado & Ramírez, 2005
- species: Mecysmauchenius puyehue Forster & Platnick, 1984
- species: Mecysmauchenius segmentatus Simon, 1884
- species: Mecysmauchenius termas Forster & Platnick, 1984
- species: Mecysmauchenius thayerae Forster & Platnick, 1984
- species: Mecysmauchenius victoria Forster & Platnick, 1984
- species: Mecysmauchenius villarrica Forster & Platnick, 1984
